Messente avatar logo

Why some messages do not get delivered

- 5 MIN READ - 06 Nov 2012

TOP 5 reasons, why SMS or text messages fail to get delivered.

When you call your friend and the phone is switched off or out of carrier’s reach, you know that instantly.

With SMS, it is much-much more complicated, as most of the heavy-lifting is done without you knowing it.

1) Phone is switched off or out of carriers reach

If you get busy signal while calling, you can try again later or just give up. When the SMS does not get delivered on the first try, it is automatically re-sent in certain intervals without you knowing it. So when the phone is available again, the message still gets delivered.

Note: Messente.com is configured to try to deliver messages in 6 hours. When the message still fails, it is marked as Failed.

2) False negative

Sending SMS requires to also receive Delivery report (DLR) from carrier or operator. When the operator fails to respond with correct receipt, sender does not know, that the message actually got delivered and marks it as Failed.

NB! USA, Canada and most Latin-American countries are known not to provide delivery reports at all.

3) Number is in roaming (abroad)

Sending an SMS to number that is currently not in home-country, is always causing lots of problems and therefore delivery to numbers in roaming is not guaranteed.

4) Sender you are using is prohibited

Some countries or operators are blocking some types of Senders. Japan for example does not allow to send SMS from regular phone number. Telia Sonera in Finland on the other hand is blocking  messages from Alphanumeric senders like “CarService1″ or “BestHotel”…

5) Carrier is blocking the SMS

Operators are also known to block some SMS routes from time to time. This also requires SMS services to re-route the message via another working route and this also can cause temporary delivery issues.

Jaanus Rõõmus

Jaanus Rõõmus - CTO

Jaanus is co-founder and CTO of Messente and makes sure its wheels keep spinning and Messente always has a full tank of fuel.

Have you met 1oT? Mobile data connectivity for IoT companies.

24 Apr 2018

Last week, Lauri wrote a good piece about keeping things real, because businesses have simple business models at their core. As one of our values, simplicity has led Messente to build a reliable and powerful SMS API and user authentication API for businesses and brands to communicate with their customers globally.

While we pride ourselves in doing global A2P SMS and 2FA very well, one of our sister companies, 1oT, uses a similar methodology of simplicity to do global internet of things (IoT) and machine-to-machine (M2M) connectivity really well.

Yuriy Mikitchenko

Yuriy Mikitchenko

A note on keeping things real

17 Apr 2018

Over the years, I've had the good fortune of talking to and doing business with many entrepreneurs and CEOs from a variety of industries. Some are first-time founders of small startups, while others are amazingly experienced serial entrepreneurs. Many of them are extremely successful in what they do.

So naturally, while listening to them talk about their businesses, I've always tried to spot any fundamental takeaways –the small drops of universal business advice distilled from those hundreds of conversations.

And it seems to me that a lot of the most profound business truths seem to point to a direction that I would call, "keeping it real.”

Lauri Kinkar

Lauri Kinkar

Next-generation Omnichannel API is well underway

10 Apr 2018

Over the last few months we’ve been setting the direction of our Omnichannel messaging API and our development team has started working on it. Considering transparency, we wanted to share the progress we’ve made on the API and give our clients something to look forward to, as well as helping clients prepare their systems for the next generation of our A2P messaging API.

Uku Loskit

Uku Loskit

Start sending messages to

for € N/A

Contact us